[Patch v2] mm/vmstat: remove unused node and zone state helpers

[Patch v2] mm/vmstat: remove unused node and zone state helpers

[Wei Yang]

Several helper functions for managing node and zone states have become
obsolete and no longer have any callers within the kernel.

  inc_node_state()
  inc_zone_state()
  dec_zone_state()

This commit removes the dead code.

Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
Cc: Joshua Hahn <joshua.hahnjy@gmail.com>
---
 include/linux/vmstat.h |  6 ------
 mm/vmstat.c            | 15 ---------------
 2 files changed, 21 deletions(-)

diff --git a/include/linux/vmstat.h b/include/linux/vmstat.h
index 3398a345bda8..cf559e2ce1d4 100644
--- a/include/linux/vmstat.h
+++ b/include/linux/vmstat.h
@@ -286,10 +286,8 @@ void mod_node_page_state(struct pglist_data *, enum node_stat_item, long);
 void inc_node_page_state(struct page *, enum node_stat_item);
 void dec_node_page_state(struct page *, enum node_stat_item);
 
-extern void inc_node_state(struct pglist_data *, enum node_stat_item);
 extern void __inc_zone_state(struct zone *, enum zone_stat_item);
 extern void __inc_node_state(struct pglist_data *, enum node_stat_item);
-extern void dec_zone_state(struct zone *, enum zone_stat_item);
 extern void __dec_zone_state(struct zone *, enum zone_stat_item);
 extern void __dec_node_state(struct pglist_data *, enum node_stat_item);
 
@@ -394,10 +392,6 @@ static inline void __dec_node_page_state(struct page *page,
 #define dec_node_page_state __dec_node_page_state
 #define mod_node_page_state __mod_node_page_state
 
-#define inc_zone_state __inc_zone_state
-#define inc_node_state __inc_node_state
-#define dec_zone_state __dec_zone_state
-
 #define set_pgdat_percpu_threshold(pgdat, callback) { }
 
 static inline void refresh_zone_stat_thresholds(void) { }
diff --git a/mm/vmstat.c b/mm/vmstat.c
index 090b5c5294b9..16b7cb24d411 100644
--- a/mm/vmstat.c
+++ b/mm/vmstat.c
@@ -671,11 +671,6 @@ void mod_node_page_state(struct pglist_data *pgdat, enum node_stat_item item,
 }
 EXPORT_SYMBOL(mod_node_page_state);
 
-void inc_node_state(struct pglist_data *pgdat, enum node_stat_item item)
-{
-	mod_node_state(pgdat, item, 1, 1);
-}
-
 void inc_node_page_state(struct page *page, enum node_stat_item item)
 {
 	mod_node_state(page_pgdat(page), item, 1, 1);
@@ -724,16 +719,6 @@ void dec_zone_page_state(struct page *page, enum zone_stat_item item)
 }
 EXPORT_SYMBOL(dec_zone_page_state);
 
-void inc_node_state(struct pglist_data *pgdat, enum node_stat_item item)
-{
-	unsigned long flags;
-
-	local_irq_save(flags);
-	__inc_node_state(pgdat, item);
-	local_irq_restore(flags);
-}
-EXPORT_SYMBOL(inc_node_state);
-
 void mod_node_page_state(struct pglist_data *pgdat, enum node_stat_item item,
 					long delta)
 {
-- 
2.34.1

Re: [Patch v2] mm/vmstat: remove unused node and zone state helpers

[Joshua Hahn]

On Thu, 25 Dec 2025 21:02:13 +0000 Wei Yang <richard.weiyang@gmail.com> wrote:

> Several helper functions for managing node and zone states have become
> obsolete and no longer have any callers within the kernel.
> 
>   inc_node_state()
>   inc_zone_state()
>   dec_zone_state()
> 
> This commit removes the dead code.
> 
> Signed-off-by: Wei Yang <richard.weiyang@gmail.com>
> Cc: Joshua Hahn <joshua.hahnjy@gmail.com>

LGTM, thanks!

Reviewed-by: Joshua Hahn <joshua.hahnjy@gmail.com>